How do scientists figure out when evolutionary events – like species splitting away from a common ancestor – happened? It turns out our DNA is a kind of molecular clock, keeping time via genetic changes.

A new study estimates the nutritional value of human flesh and challenges the belief that prehistoric humans engaged in cannibalism just to fill their stomachs.

Dental calculus deposits show this Neadertal was eating poplar, a source of aspirin, and moulded vegetation including Penicillium fungus, source of a natural antibiotic.
Paleoanthropology Group MNCN-CSICMarch 9, 2017